Apple updated its 3G iPod nano software with 1.1.2 update.

iPod nanao

Apple updated its 3G iPod nano software. Notes on the update are limited. Neither the download or Apple’s support pages contain any specific information on what was fixed.
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The only information Apple provided was that the update included some bug fixes. The 1.1.2 update is only available through iTunes at this time.

source:read